Let me help you with a list of 2021 free agents (top 20 by 2020 salary and best RFA)
1. Paul (PO) - not max player anymore, will probably take his PO
2. LeBron (PO) - yeah right. Will stay in LA
3. Kawhi (PO) - same as above
4. Griffin (PO) - not max player anymore, will take his PO
5. George (PO) - I find it highly unlikely he would not stay in LA. Outside of GA best theoretical option that could happen. But a longshot imho
6. Hayward
7. Conley - too old, not max player anymore
8. Lowry - too old, not max player anymore
9. DeRozan - do I need to comment?
10. OPJ - worth around 15 per, still reachable even with Harris on board
11. JRue (PO) - I think he will not be a FA. He will either resign or not take his PO
12. Gobert - I don't think he is worth max
13. Drummond -
14. Adams -
15. Giannis - pipedream
16. Aldridge -
17. Batum
18. Oladipo - you don't want to pay max for him
19. THJ
20. Schroeder
Best RFA:
1. Ball, Fultz, are not max guys
2. Tatum will resign this season
3. Isaac - I guess Orlando will resign him, also a HUGE injury risk
4. Fox - will resign with Sacramento
5. I have a hard time seeing any other guy being worth more than 20 per (likely less)
So out of all this "great long list of free agents" you have an extreme longshot with Paul George or Giannis as really top guys. The rest are in the Harris range at best.